EP2902141B1 - Système avec butée pour porte-outils - Google Patents

Système avec butée pour porte-outils Download PDF

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Publication number
EP2902141B1
EP2902141B1 EP15000213.7A EP15000213A EP2902141B1 EP 2902141 B1 EP2902141 B1 EP 2902141B1 EP 15000213 A EP15000213 A EP 15000213A EP 2902141 B1 EP2902141 B1 EP 2902141B1
Authority
EP
European Patent Office
Prior art keywords
stop
receiving opening
tool
coolant
insertable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15000213.7A
Other languages
German (de)
English (en)
Other versions
EP2902141A1 (fr
Inventor
Franz Haimer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Franz Haimer Maschinenbau KG
Original Assignee
Franz Haimer Maschinenbau KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Franz Haimer Maschinenbau KG filed Critical Franz Haimer Maschinenbau KG
Publication of EP2902141A1 publication Critical patent/EP2902141A1/fr
Application granted granted Critical
Publication of EP2902141B1 publication Critical patent/EP2902141B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/028—Chucks the axial positioning of the tool being adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/183—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details internal, i.e. with spreading action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/12—Stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/136—Springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
    • B23B31/1179—Retention by friction only, e.g. using springs, resilient sleeves, tapers using heating and cooling

Definitions

  • the invention relates to a system according to the preamble of claim 1.
  • a system is, for example, from US2013 / 0328275 A1 known.
  • various tool receptacles are known from the prior art, which have grooves or bores in the receiving opening on the side facing away from the spindle in order to direct coolant or lubricant to a tool-side dispensing opening.
  • tool holders are understood to be systems that are used as a connection between tool and machine tool.
  • Tool holders in the context of this application are in particular to be understood as tool holders that have a possibility of clamping in a machine spindle on one of their sides, for example a steep taper or hollow shank taper holder and on the other side a clamping device for tools with a particularly cylindrical shank shape, such as milling cutters.
  • a clamping device for tools can be designed, for example, as a "Weldon” or “Whistle-Notch” system, as a chuck with collet, as a hydraulic expansion chuck or as a shrink-fit chuck.
  • Such a system is, for example, from the German patent application DE 102008044996 A1 known.
  • the coolant or lubricant coming from the machine tool through an opening on the spindle side, is passed through a through opening in the body of the tool holder to the receiving area for cylindrical tool shanks. There the coolant or lubricant can be guided to a tool-side receiving opening via a coolant guide, depending on the embodiment of the tool and the tool holder.
  • a coolant guide consists, for example, of one or more bores in the chuck, as one or more grooves which are formed on the inside of the receiving opening provided for the tool and are limited to the central axis by an inserted tool, or by a combination of these possibilities.
  • the object of the invention is to create an uncomplicated and inexpensive way of ensuring a reliable supply of coolant or lubricant without weakening the tool holder.
  • the insertable stop in unused form having an outer circumference that is larger or at least as large as the inner diameter of the receiving opening.
  • the receiving bore ends in a cylindrical enlargement that has a slightly larger diameter than the bore.
  • the stop can partially relax elastically again and adapt to the diameter of the enlargement.
  • the stop Due to the radial preload, the stop is centered without play. In conjunction with a design of the stop that is preferably symmetrical to the tool axis, it generates no or only a very small unbalance.
  • the dimensioning of the stop that can be used is consequently dependent on the inside diameter of the receiving opening for the cylindrical tool shank.
  • the wall thickness of the stop that can be used is selected so that, although it ensures a stiff behavior in the axial direction, at the same time it allows a radially elastic deformation and does not hinder the flow of coolant or lubricant.
  • the insertable stop (7) has four external, lateral contact surfaces (1) which have a slight, convex curvature in order to adapt to the inner surfaces of the receiving opening (8).
  • a bending point (2a, 2b) is located at the side ends of the contact surfaces (1) and between the contact surfaces (1).
  • the bending points (2a, 2b) are connected to one another via essentially straight legs (3) which form an angle (4) of approximately 40 ° between the contact surfaces (1).
  • the interior angle (5) between a contact surface (1) and an adjacent leg (3) is also approximately 70 °.
  • the preferred embodiment thus has similarities with a paw cross.
  • a bending point (2a, 2b) at the lateral ends of the contact surfaces (1) and between the contact surfaces (1), so that the essentially straight legs of mutually facing bending points (2a) of two adjacent contact surfaces (1), which meet in the intermediate bending point (2b), enclose an acute angle.
  • the external, lateral contact surfaces (1) move towards each other when an external force is applied and do not push lateral contact surfaces (1) transverse to their own direction of movement away from them, as would be the case with an angle (4) greater than 90 °.
  • all Bending elements (2a, 2b) are loaded essentially uniformly and the insertable stop is essentially uniformly deformed.
  • the invention is not limited to this embodiment, but can take on a variety of forms in its outer contours. Instead of four contact surfaces (1), two, three, five or any number of external, lateral contact surfaces (1) can be formed.
  • the outer contour must allow the insertable stop (7) to develop a radially elastic behavior.
  • the reversible deformation ensures that the outer, lateral contact surfaces (1) remain pressed against the inside of the receiving opening (8), so that it remains in its position even when a tool is changed and thus ensures that the insertable stop is in a
  • the plane transverse to the axis of rotation (6) of the tool holder (9) remains and consequently does not tilt in an inclined position.
  • the insertable stop (7) is made of plastic, preferably of polyetheretherketone (PEEK).
  • PEEK polyetheretherketone
  • FRP fiber-reinforced plastics
  • CFRP carbon fiber reinforced plastics
  • GRP glass fiber reinforced plastics
  • other materials such as different metallic alloys such as spring steel, are also possible.
  • Other materials or composite materials can also be used, provided they meet the requirements necessary for use in the invention.
  • the materials In addition to the radial elasticity already mentioned and a stiff behavior in the axial direction, the materials must also have a certain heat resistance. Both against the temperatures that occur during the machining of a workpiece and against those that arise when the tool (10) is inserted when a shrink fit chuck is used.
  • the hardness of the material used should be less than that of the inside of the receiving opening (8). Although this does not represent a functional condition in relation to the invention, it is understandable that the inside of the receiving opening (8) should be avoided by the insertable stop (7), for example by scratching.
  • Another property that the material has should is a resistance to the coolants or lubricants. This means both a chemical reaction such as rust or the dissolution of the plastic compound, as well as a reaction to the temperature of the coolant, such as a break due to excessive cooling.
  • the coolants or lubricants in the context of this invention can be various liquid or gaseous media or mixed forms, for example a mist of air and oil droplets, a mixture of oil and water or a fluid whose boiling temperature is below room temperature, e.g. CO 2 .
  • a particularly advantageous embodiment of the system according to the invention comprises a tool holder (9) with a coolant control system in the chuck and an insertable stop (7) for tool holders, with bores (11) running in the longitudinal direction being arranged as a coolant control system in the tool holder (9).
  • a coolant or lubricant can be directed to outlet openings (14).
  • a coolant or lubricant can be directed to outlet openings (14).
  • FIG. 9 Another advantageous embodiment of the system according to the invention, not shown, comprises a tool holder (9) with a coolant control system in the chuck and an insertable stop for tool holders (9), the coolant control system being designed as at least one flat groove on an inside of the receiving opening (8), which is connected to a
  • the tool-side end of the tool holder (9) ends in an outlet opening which is limited by the tool shank of a tool (10) to the axis of rotation (9), or in the area of the tool-side end of the tool holder a storage and / or collection space for coolants or lubricants is present, into which the at least one flat groove opens and wherein the collecting space is connected to an outlet opening which is designed as an annular gap, the storage and / or collecting space and / or the annular gap being at least partially delimited by a tool shank.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping On Spindles (AREA)

Claims (10)

  1. Système muni d'un arbre d'outil cylindrique d'un outil (10), muni d'un logement d'outil muni d'une ouverture de logement (8) pour le serrage de l'arbre d'outil cylindrique et muni d'une butée (7) insérable dans l'ouverture de logement (8) pour l'arbre d'outil cylindrique, munie d'au moins deux surfaces d'appui latérales (1), radialement extérieures, pouvant s'appuyer contre un côté intérieur de l'ouverture de logement, un emplacement de courbure (2a, 2b) se trouvant respectivement au niveau de terminaisons latérales des surfaces d'appui (1) de la butée (7) et entre les surfaces d'appui (1) de la butée (7), et les emplacements de courbure (2a, 2b) étant reliés par l'intermédiaire de branches essentiellement droites (3), caractérisé en ce que les branches (3) d'emplacements de courbure tournés l'un vers l'autre (2a) de deux surfaces d'appui voisines (1), qui se rencontrent dans l'emplacement de courbure (2b) situé entre elles, forment un angle aigu, et la butée insérable (7) présente un comportement radialement élastique.
  2. Système selon la revendication 1, caractérisé en ce que le diamètre extérieur de la butée (7) est supérieur au diamètre le plus petit de l'ouverture de logement (8).
  3. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée (7) comprend des ouvertures pour le passage de fluides.
  4. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée insérable (7) est constituée par un matériau qui présente une valeur de dureté plus faible que l'ouverture de logement (8) pour le logement d'un arbre d'outil cylindrique.
  5. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée (7) est constituée par de la matière plastique, de préférence Peek.
  6. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée comprend quatre surfaces d'appui extérieures (1), l'angle intérieur (5) entre la surface d'appui extérieure (1) et une branche correspondante (3) étant inférieur à 90°, de préférence d'environ 70°.
  7. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée (7) est constituée par une gaine de hauteur et épaisseur essentiellement constantes, qui est de préférence fermée sur elle-même.
  8. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée présente une épaisseur de paroi inférieure à 2 mm.
  9. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de paroi de la butée au niveau des emplacements de courbure (2a, 2b) entre une surface d'appui (1) et une branche (3) et/ou entre deux branches (3) est supérieure à celle au niveau des surfaces d'appui (1) et des branches (3).
  10. Système selon l'une quelconque des revendications précédentes, caractérisé par un mandrin de serrage et un système de conduction d'agent réfrigérant dans le mandrin de serrage muni d'un canal d'agent réfrigérant (15), la butée (7) étant positionnée sur la base de l'ouverture de logement (8) de telle sorte qu'un bouchage du canal d'agent réfrigérant (15) par serrage d'un outil (10) soit empêché et que l'agent réfrigérant puisse d'écouler au travers de la butée insérable (7) dans le système de conduction d'agent réfrigérant du mandrin de serrage.
EP15000213.7A 2014-01-29 2015-01-26 Système avec butée pour porte-outils Active EP2902141B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014000994.7A DE102014000994A1 (de) 2014-01-29 2014-01-29 Einsetzbarer Anschlag für Werkzeugaufnahmen

Publications (2)

Publication Number Publication Date
EP2902141A1 EP2902141A1 (fr) 2015-08-05
EP2902141B1 true EP2902141B1 (fr) 2021-01-13

Family

ID=52423560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000213.7A Active EP2902141B1 (fr) 2014-01-29 2015-01-26 Système avec butée pour porte-outils

Country Status (2)

Country Link
EP (1) EP2902141B1 (fr)
DE (1) DE102014000994A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110198818A1 (en) * 2004-06-14 2011-08-18 Franz Haimer Maschinenbau Kg Tool holder for a rotary tool

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB339455A (en) * 1929-11-16 1930-12-11 William Semelle Thompson Improvements relating to retaining devices for bolts, pins, shafts and the like
US2157516A (en) * 1937-10-18 1939-05-09 Leonard A Young Washer
DE3611998A1 (de) * 1986-04-09 1987-10-15 Guehring Gottlieb Fa Vollhartmetall-spiralbohrer mit innenliegenden kuehlkanaelen
DE10033211A1 (de) * 2000-07-07 2002-02-07 Siemens Ag Elastomerfeder und Rasteinrichtung
DE10334670A1 (de) * 2003-07-30 2005-02-17 E. Zoller GmbH & Co. KG Einstell- und Messgeräte Werkzeughaltevorrichtung, Anschlagelement und Werkzeugfutter
DE102006016883A1 (de) * 2005-03-29 2006-10-05 E. Zoller GmbH & Co. KG Einstell- und Messgeräte Verfahren zum Befestigen eines Werkzeugs in einem Werkzeugfutter und Werkzeugfutter
DE102006028408A1 (de) * 2006-04-10 2007-10-31 Franz Haimer Maschinenbau Kg Auszugssicherung von Werkzeugen aus Werkzeughaltern mit einer Werkzeugaufnahme
DE102008044996A1 (de) 2008-08-29 2010-03-04 Franz Haimer Maschinenbau Kg Werkzeughaltervorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110198818A1 (en) * 2004-06-14 2011-08-18 Franz Haimer Maschinenbau Kg Tool holder for a rotary tool

Also Published As

Publication number Publication date
DE102014000994A1 (de) 2015-07-30
EP2902141A1 (fr) 2015-08-05

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